Elevating means for lance type lubricant pumps



May 19, 1953 A. P. FOX

ELEVATING MEANS FOR LANCE TYPE LUBRICANT PUMPS Filed Oct. 21, 19:48

2 Sheets-Sheet l May 19, 1953 p, ox 2,639,062

ELEVATING MEANS FOR LANCE TYPE LUBRICANT PUMPS Filed Oct. 21, 1948 2Sheets-Sheet 2 r11I11 l llgllllglllIII/11111110W FIGQ6. a3

53 5 697 1 ,0 3 6/ 65 7 5 I f 1| I W I III] I 49 I 49 9 63 7 n: 73 45 I73 l 2s M 4 P FW 15 w: 5.2) i 3 a}: H M J I!!! V Patented May 19, 1953ELEVATIN G MEANS FOR LANCE TYPE LUBRICANT PUBIPS Alexander P. Fox,University City, Mo., assignor to Lincoln Engineering Company, St.Louis, Mo., a corporation of Missouri Application October 21, 1948,Serial No. 55,659

20 Claims. (01. 222-325) g This invention relates to lubricant pumps,and with regard to certain more specific features, to an elevatinglubricant-pump construction.

Among the several objects of the invention may be noted the provision ofa simple, strong and conveniently operable elevating lubricant pumpconstruction facilitating interchange of lubricant containers; theprovision of an elevator type of pump construction requiring only a lownumber of parts in construction and a minimum of floor space forinstallation, without sacrifice of ri idity and strength; the provisionof a construction of the class described which assures that the pumppart during interchange shall be protected against injury orcontamination; and the provision of a device of this class whichprovides for a neat and orderly installed appearance. Other objects willbe in part apparent and in part pointed out hereinafter.

The invention accordingly comprises the elements and combinations ofelements, features of construction, and arrangements of parts which willbe exemplified in the structures hereinafter described, and the scope ofthe application of which will be indicated in the following claims.

In the accompanying drawings, in which one of various possibleembodiments of the invention is illustrated,

Fig. 1 is an isometric view illustrating the invention generally, withits parts in a lowered position;

Fig. 2 is a front elevation showing certain parts raised and swungaside;

Fig. 3 is a plan View of Fig. 2;

Fig. 4 is a vertical median section of certain elevator parts viewedfrom the left of Fig. 1, but in elevated position prior to being swunaside;

Fig. 5 is a fragmentary view similar to Fig. 4 but illustrating releaseof a tripping mechanism;

Fig. 6 is another fragmentary view similar to Fig. 5 showing what may beconsidered either to be lowering conditions after a trip mechanismrelease or raising conditions prior to latching by the trippingmechanism; and,

Fig. 7 is a perspective view of a modified form of supporting bracket.

Similar reference characters indicate corresponding parts throughout theseveral views of the drawings.

Referring now more particularly to Figs. 1 -3, there is shown at numeralLin dotted lines a standard commercial lubricant container. It is commonpractice to align several drums such as I containing variou differentlubricants and to provide a so-called lance type of pump for each meansof fasteners I.

one. Typical details of suitable lance pumps may befound. in U. S.Patents 1,925,832, 1,970,591, 2,122,020, and others. Such a pump needsto be lifted from its lubricant container whenever an interchange ofcontainers is to be made, such as, for example, when the supply in acontainer is exhausted. A new container is then brought'into place andthe pumpreinserted. It is important that when such a pump is removedfrom acontainer it be not laid about promiscuously because of the dangerof damage to it or contamination of adhered lubricant on the pumpbarrel.

Heretofore gang elevators have been used for the pumps in rows ofcontainers, but such elevators have been complex and expensive. Theyalso unnecessarily raise all pumps when usually only one at a timerequires placement. However, the prior art elevators had the advantageof a neat appearance.

By means of the present invention, a neat appearance is provided for arow of individually elevator-fitted containers, but the apparatus issimple, strong and less costly. It provides for individual elevatorcontrol of a given pum of a given container. Besides providing aneatappearance for a row of containers, each is accessible independentlywith minimum effort and maximum safety on the, part of the user.

Referring again to the drawings, there is shown at V avertical,trough-shaped base. This consists of a back plate 3 and two dihedralside plates 5 bolted thereto. Th base is held to the floor, preferablynear a wall (not shown), by The base ha no bottom so that containers maybe slid into it properly to be positioned without the need for liftingthem.

Attached to the back of the plate 3, by means of a suitable channelpiece 9 is an elevator cylinder ll. This is shown more particularly inFigs. 4-6. This cylinder has a bottom head [3 having a restricted inletmember I5 for connection with an upwardly extending air pipe H. The airpipe I? passes up to a fitting l9 clamped on cylinder Ii. An inletnipple 2| on the fitting communicates with the pipe IT. The fittingaccepts an air coupler 23 which may be manually applied and removed. Thecoupler 23 is on the end of a flexible air hose 25 leading froman airsupply line 21. This supply line 21 maybe carried upon the wall behind arow of containers, a hose 25 being provided for each required coupler.By applying the coupler 23 to the nipple 2 I, air may be introduced intothe bottom of the cylinder l I. This operation is exemplified in Figs. 2and 3. As will be shownbelow, this operation is elective.

When the coupler 23 is removed from the nipple 2I, air more or lessslowly may escape from the cylinder I I through the restricted outletI5, pipe I1 and nipple 2 I.

Telescoping the cylinder I I is a sliding cylinder 29, which is closedat the top by means of a head 3|. Within the cylinder 29 and extendingfrom its lower end is a piston rod 33 having a shouldered extension 35.The shoulder is shown at 31. Attached to the upper end of the extension35 is a control knob 39 between which and the head 31 is located acompression spring 4I. Asleeve 43 maintains the spring 4| straight. Thespring 4I normally biases the piston rod 33 upward to a point where theshoulder 31 engages the head 3 I.

At its lower end, the rod 33 extends from the telescoping cylinder 29into the cylinder I I, where it is provided with a round latch trigger45. Below the trigger 45 is an integral piston 41 fitting the cylinder II. Broadly, the trigger 45 is in the shape of a spool having adownwardly beveled head 49 and a lower flange 50. The outside diametersof the head 49 and flange 59 are only slightly smaller than'the insidediameter of the cylinder I I. Thus in eiiect'the trigger is groovedbetween head 49 and flange c.

The fitting I9 is clamped around the cylinder II a distance from theupper end of the latter. As above described, it provides outside of thecylinder II a passage between pipe I1 and inlet nipple M. It alsoincludes a boss 5I in which is a sleeve liner 53 held in placeby meansof a cross pin 55. The bore of the liner 53 is in line with acounterbored opening 59 through the wall of the cylinder II. Within thesleeve 53 is a hollow latch in the form of a lug 51. This is slidable inthe liner 53 and through the opening 59. This lug 51 is providedexteriorly with an operating handle GI, the entire piece being slottedas shown at 53 to accommodate the pin 55. A compression spring 65,reacting between the pin 55 and the interior of the 1ug'51, biases thelug inward with respect to the cylinder II. Inside, the lug 51 isprovided with a notch 61, the upper side of which is fiat as shown at59, and the lower side of which is upwardly beveled as shown at H. Thenotch 61 accommodates the head 49, the flat 69 being engageable with theflat top thereof. The bevel II is engaged by the lower bevel 13 of thehead when the latter is pushed down, as will be described.

From the above it is clear that if the sliding cylinder 29 is down, orpartially down as shown in Fig. 6, the latch 51 must be back in theliner 53. If the assembly of the cylinder 29, trigger 45 and piston 41is raised, the parts will pass through the position shown in Fig. 5. Theupward motion is'limited when the head 49 engages the flat 39, the latchat this time being biased in by the spring 65. To permit this biasing-inmotion is the purpose of the notch 61. The above places the bottom ofthe cylinder 29 above the latch 51, as shown in Fig. 4, so that theparts associated with the cylinder 29 are held up as illustrated in Fig.2. To release the cylinder 29 to let it drop, an operator may eitherwithdraw the latch 51 by pulling out on its handle 6 I, or he mayinstead push down on the button 39. In the latter case, a downwardmotion of the piston rod 33 relative to the cylinder 29 causes the bevel13 on the trigger 45 to engage the bevel H on the latch 51. Thus thelatch is pushed back clear of the bottom end of the cylinder 29 torelease the latter for descent. Fig. 5 illustrates the condition ofparts after release and at the beginning of a 4 descent. Thus it will beseen that the elevated cylinder 29 may be released for descent either bya pull on the handle BI or a push on the button 352. In. either event,the latch 51 is caused to retract.

It will be observed that by employing telescoping cylinders II and 29,as distinguished from a mere piston rod and cylinder telescopingconstruction a higher degree of rigidity is obtained for the telescopingsystem to withstand the overhanging weight later to be described. Thepiston rod 33 is relieved of stiifening duties and serves only to assumecompressive thrust from the piston 41 and to operate the trigger 45.Thus no outside crosshead and guide structure is needed.

It will be clear that when the assembly of piston 41, rod '33 andcylinder 29 is released, it will be buffed by a cushion of air under thepiston. If this air is slowly released through the restriction, theassembly will settle gradually.

Supported on the head 3I is a bracket 15 formed as two angular arms orhandles 11 which curve down and fasten at 19 to a lid 8|. It will beunderstood that the ordinary commercial lid of the container I has beenremoved when the container is put into service. The lid 81 supports agenerally semi-circular shielding apron 83 which serves as a dress andprotection for the container I when the parts are down as shown inFig. 1. The lid also supports the air engine part 85 of the lance typeof pump above mentioned. The cylinder of this pump is shown at 81. Theengine part 85 is attached to the lid 8|. The lance pump cylinderextends down from the air engine part 85 through a suitable opening inthe lid 8I. At its bottom end it has a suction inlet 89. The lubricantoutlet of the pump is shown at 9I, to which is coupled a flexiblelubricant line 93 leading to a supply line 95. The supply line 95, likethe air line 21, may be attached to the wall in front of which thecontainers are set. Air may be supplied to the pump when it is down withits suction inlet 89 in the container I. This may be done by attachingair coupler 23 to the nipple 91 of the pump. This operates the pump towithdraw lubricant from the bottom of the container through the suctionvalve 89, through the pump cylinder 81 and out to the outlet connection9I. said patents make clear how lance pumps operate in theseparticulars.

In order to center the lid 'BI when it is down with the apron 83covering the front of the container (as shown in Fig. 1), a cammingnotch 99 is provided in the front edge of the upper end of cylinder II.A pin IIlI, fastened in the sliding cylinder 29, is guided when down bythe notch 99 to provide the desired centering.

It will be observed that the circular form of the trigger 45, includingits head 49, allows the trigger to operate upon the latch 51 regardlessof any lateral rotation of the assembly 41, 45, 33, 29 in the cylinder II.

Complete operation will b clear from the above. Assuming the container Ito be centered in the base V, the lid 8I is normally directly above itsupper opening, with the apron 83 shielding the outside front of thecontainer as shown in Fig. 1. This protects the container and makes adressy appearance, particularly when several containers incorporatingthe invention are arranged in a row against the backing wall. The apronalso prevents the container, which may be greasy, from smudging theclothes of passersby. By attaching coupler 23 to the nipple 91, the pumpis operated and lubricant withdrawn from the container and dispensedover line 95. To replace an empty container, the coupler 23 is detached.The operator may then pull up on the handle 11, thus raising the slidingcylinder 29 until it is latched up by the latch 51. Or, the operator maychoose to apply the coupler 23 to the nipple 2|, so as to introduce airinto the bottom of the stationary cylinder I I. This has a similarraising and latching effect. It will be observed also that therestriction I controls the in-rush of air into the cylinder I I upon thepneumatic raising operation, so that there is not a violent upwardmovement.

After either of the above procedures, the operator may laterally swingthe assembly of the lid, apron and pump, as illustrated in Figs. 2 and3. The result is easy access into the container I for inspection todetermine whether it is really empty before making an exchange. Or itmay be removed and replaced by another filled container.

To return the device to operating position, the lid 8| is again swungforward until the pump barrel 81 is more or less central over theopening of the container. Then either the handle BI is pulled out, orthe button 39 is pushed down. In either event, the latch 51 is caused torelease the cylinder 29, which descends by gravity. At this time thecoupler 23 must have been removed from the nipple 2| to allow air toescape through the pipe I1 and nipple 2 I. The descent is cushioned andcontrolled because of the throttling action upon the air escaping'fromthe cylinder I I by means of the restriction I5.

As the lid approaches the end of its downward movement, the pin IOI isguided by the notch 99 so as exactly to center the lid over the openingof the container I, the parts being then again as shown in Fig. 1.

It should be observed that while the use of the container guide V on thefloor is preferable as a support for the telescoping elements, it mightbe placed on a wall, and also a non-centering base may be used. If it isdesired to support the device on a wall instead of on the floor, thebase V can be modified to become a wall bracket for supporting thetelescoping parts. Such a construction is shown in Fig. '7, wherein themodified bracket is indexed M. In this case the former side plates 5 arelettered 6 and the former back plate 3 is lettered 4. The side platesarecarried rearward and angled as shown at 8, for attachment to a wallW. The fastening means are shown at Ii). In this modification the formerchannel piece 9 is extended and indexed I2. The relationship of theparts to the stationary cylinder II of the telescoping arrangement isshown. By means of this construction, the device may be supportedentirely upon the wall while the lubricant container rests upon thefloor. As above suggested in either the case of the 'fioor type or theWall type mounting the centering guide plates 5 or 5 may be eliminatedbut this is not preferred.

In view of the above, it will beseen that the several objects of theinvention are achieved and other advantageous results attained.

As many changes could be made in the above constructions withoutdeparting from the scope of the invention, it is intended that allmatter contained in the above description or shown in the accompanyingdrawings shall be interpreted as illustrative and not in a limitingsense.

6 I claim: 1. An elevating lubricant-pump construction for verticalmovement of application of lance type pumps to and from interchangeablecontainers,

comprising vertically arranged telescoping assemblies, one of which isstationary and the other being vertically movable and rotary relative tothe other, an overhanging support for a pump mounted upon the upper endof the movable telescoping assembly, said support including a containercover, a latching mechanism having one element thereof near the upperend of the stationary assembly and a cooperating element thereof nearthe bottom end of the movable assemblyadapted automatically to engagewhen the movable member is lifted to a topmost position so as to holdsaid movable assembly in said topmost position, said latching mechanismcomprising a movable detaining member on one of the telescopingassemblies and a part on the other telescoping assembly for engagementby said movable detaining member in order to latch, said part permittingrotary movement of the movable telescoping assembly when latched up sothat the cover may be raised from a container and swung laterally,manual means for disengaging the latch, and a piston in the stationarytelescoping assembly and carried on the movable telescoping assemblynear its lower end, said stationary telescoping assembly including arestricted air supply and exhaust port near its lower end forcontrolling rising and falling movements of the movable assembly. I

2. An elevating lubricant-pump construction for vertical movement ofapplication of lance type pumps to and from interchangeable containers,comprising, vertically arranged telescoping inner and outer cylinders,the outer one of which is stationary and fixed, the inner cylinder beingvertically movable and rotary, an overhanging support for the pumpattached to the upper end of the inner cylinder and constituting a coverfor a container, a latching mechanism having one element thereof nearthe upper end of. the stationary cylinder and a cooperating elementthereof near the bottom end of the movable cylinder and rotary therewithadapted automatically to engage when the movable cylinder is lifted to atopmost position so as to hold said movable cylinder for rotation insaid topmost position, said latching mechanism comprising a movabledetaining member on one of the telescoping cylinders and a member rotarywith the other cylinder for engagement by said movable detaining memberin order to latch, a piston in the stationary cylinder but located belowthe movable cylinder, a piston rod extending from the piston to a pointoutside the movable cylinder, one of said latch elements being carriednear the lower end of said rod, and an outside latch control member onthe outer end of said rod.

3. An elevating lift for a lubricant-pump construction comprising atrough-shaped base adapted to receive and guide a lubricant containerinto a predetermined position, a single stationary vertical aircylinder, an assembly of elongated parts which telescope in saidcylinder and including a piston in the cylinder, said cylinder beingattached at one end to the base for support, a pump support cantileveredoutwardly from the upper end of the telescoping assembly, a latchoperative with said telescoping assembly adapted automatically to holdsaid telescoping assembly in an elevated position upon raising theassembly, and means for releasing said latch at will, said cylinderhaving a throttled air re- 4. An elevating lubricant-pump constructioncomprisinga verticaltrough-"shaped base adapted to receive and guide alubricant container into a predetermined position, a single stationaryvertical air cylinder fixed behind said base, an

assembly of parts which telescope said cylinder and-including'apiston inthe cylinder, the assembly being adapted to be moved upward and turned,said assembly including an overhanging lid for the container and asupporting member therefor positioned outwardly from the top of saidassembly, a latch adapted automatically to hold said telescopingassembly in an elevated position without interfering with its turningmovement, and means for releasing said latch at will, said cylinderhaving a throttlecl air release below said piston for cushioning thedescent of the assembly.

5. An elevating lubricant-pump construction for use in connection with acontainer and comprising a base adjacent which the container may belocated, a stationary vertical air cylinder near said base, a rotary andtelescoping assembly including a piston in said cylinder adapted to beraised and turned, said assembly supporting an overhanging lid for thecontainer, a latch adapted automatically to hold said telescopingassembly in a raised position without interfering with its turning,means for releasing said latch at will, and a guiding device forautomatically turning the assembly to a predetermined position upondescent irom'its raised position.

6. An elevating lubricant-pump construction comprising a Verticaltrough-shaped base adapted to receive a lubricant container and guide itinto a predetermined position without lifting, a. stationary verticalair cylinder extending up from behind said "base, a rotary andtelescoping assembly including a piston in said cylinder adapted to beraised and turned, said assembly supporting an overhanging lidv for acontainer in guided position in the base, a latch adapted automaticallyto hold said telescoping assembly in a raised position withoutinterfering with its turning, means for releasing said latch at will,and a guiding device for automatically turning the assembly to apredeterl ned position upon descent from its raised position, said aircylinder having a throttled airport below the piston for cushioning saiddescent.

'7. An elevating lubricant-pump construction comprising a verticaltrough-shaped base adapted to receive and guide a lubricant containerinto a predetermined position, a stationary vertical air cylinder behindsaid base, a telescoping assembly in said cylinder adapted to be movedupward and swung sideward, said assem bly including the lid for acontainer in guided position in the base, means attached to the upperendoi said assembly supporting said lid, a latch adapted automaticallyto hold said telescoping assembly in an elevated position withoutinterfering with its lateral movement, means for releasing said latch atwill, and a piston forming part of said telescoping assembly and fittingsaid cylinder, said cylinder having a throttling air port wherebydescent of the telescoping assembly is controlled when the latch isreleased.

8. Lubricating apparatus comprising a lower guide for centering alubricant container relative to a pump, vertically sliding telescopingmemhere, one-of which is fixed adjacent the guide, the other of which isvertically movable and laterally swingable, an overhanging supportextending from the movable telescoping member for a lubricant pumpinsertable in the=container and comprising a lifting handle and a coverfor a container, the lifting handle and container cover being carried bythe overhanging support outwardly from the top of movable telescopingmemher, and a latch for holding said movable telescoping me'mber in anelevated position with the pump both laterally and vertically clear ofthe container.

9. Lubricating apparatus comprising a lower guide for centering alubricant container relative to'a pump, a single pair or verticallysliding telescoping cylinders, one of which is fixed adjacent the guide,the other of which is vertically movable and rotary, an overhanging pumpsupport extending from the movable cylinder, a container lid carried bythe overhanging support outwardly from the movable cylinder, the lidbeing cooperative with the top of a centered container and the pumpbeing insertable into the container upon lowering the movable cylinder,and a latch for holding said'movable cylinder in an elevated positionwith the lid open and the pump laterally clear of the container, saidlatch being arranged to allow the necessary rotary swinging of thesupported lid and pump.

10. Lubricating apparatus comprising a lower guide for centering alubricant container relative to a pump, vertically sliding telescopingmembers, one of which is fixed adjacent the guide, the other or which isvertically movable and rotary, an overhanging pump support extendingfrom the movable telescoping member, a container lid and apronassembly-carried by the pump support and cooperative with the containerupon lowering, and a latch for holding said movable telescoping memberin an elevated position with the lid, pump and apron clear of thecontainer, said latch being arranged to allow the necessary rotaryswinging of the supported lid and pump.

11. Lubricating apparatus comprising a lower guide for centering alubricant container relative to a pump, vertically sliding telescopingmembers one of which is stationary adjacent the guide, the other ofwhich is vertically movable and laterally swingable, an overhangingsupport extending from the movable telescoping member for support for alance type lubricant pump, a container lid carried by the overhangingsupport outwardly from the vertical movable telescoping member, the pumpand lid being cooperative with the container, a latch for holding upsaid movable telescoping member with the pump clear of the container andthe lid open, and a partial apron for the container depending from saidlid adapted to cover a side of the container when down but to expose thecontainer when up and swung aside to permit convenient inspection andremoval of the container.

12. In an elevator for lubricant pumps and the like, a stationaryvertical cylinder having a throttled air port adjacent its lower end, asliding telescoping cylinder in said stationary cylinder and extendingfrom its upper end, a latch operable through the wall of the stationarycylinder adapted automatically to hold up the telescoping cylinder whenraised, a relatively axially movable piston rod in the telescopingcylinder, an outside control for said rod accessible from the top ofsaid telescoping cylinder, a piston on said rod beneath the telescopingcylinder and having sliding engagement with the stationary cylinder, anda release trigger on the rod for the latch operable by relative axialmovement between the rod and the telescoping cylinder, whereby thetelescoping cylinder is automatically latched up upon movement from thestationary cylinder and released by outside control of the latch,downward movement of said piston being controlled by the throttling ofair forced through said port by the piston.

13. In an elevator for lubricant pumps and the like, a stationaryvertical cylinder having a throttled air port adjacent its lower end, asliding and rotary telescopng cylinder in said stationary cylinder andextending from its upper end, a latch operable through the wall of thestationary cylinder adapted automatically to hold up the bottom of thetelescoping cylinder when raised while permitting its rotation, arelatively axially movable piston rod in the telescoping cylinder, anoutside control for said rod accessible from the top of said telescopingcylinder, a piston on said rod beneath the telescoping cylinder andmovably engaging in the stationary cylinder in both a rotary and axialmanner, a latch release trigger on the rod operable by relative axialmovement between the rod and the telescoping cylinder to release thelatch but accommodating relative rotary movement between the trigger andlatch, whereby the telescoping cylinder is automatically latched up forrotary movement upon retraction from the stationary cylinder andreleasable by said outside control from the latch for downward movementcontrolled by the throtting of air forced from said port by the piston.

14. An elevator for lubricant pumps and the like comprising a stationaryvertical cylinder, a sliding telescoping cylinder in said stationarycylinder, a latch operable through the wall of the stationary cylinderadapted automatically to hold up the telescoping cylinder when raised, arelatively axially movable piston rod in the telescoping cylinder, anoutside axial control for said rod accessible from the top of saidtelescoping cylinder, a piston on said rod beneath the telescopingcylinder and engaging the stationary cylinder, and a trigger on the rodoperable by relative movement between the rod and the telescopingcylinder to release the latch, the trigger being of circular formallowing operative engagement with the latch in any rotary position ofthe telescoping cylinder, and the trigger.

15. An elevating lubricant-pump construction providing for verticalmovements of application of downwardly extending lance type pumps to andfrom adjacently located interchangeable containers, comprisingvertically arranged telescoping assemblies, one of which is fixed, theother telescoping assembly being vertically movable on said fixedassembly, an overhanging pump support mounted at the upper end of themovable telescoping assembly, said pump support carrying a containercover positioned above the pump lance and below which cover the lanceextends downward, and a latch mechanism which is automatically operativeupon movement of the movable telescopic assembly to an elevated positionto hold said movable assembly in said elevated position, said movableassembly being rotary on the stationary assembly when latched, so assubstantially both vertically and laterally to clear the cover and pumplance for movement with respect to an adjacent container.

16. An elevating lance type lubricant pump construction for verticalmovement of application of lance type pumps to adjacently locatedcontainers, comprising vertically arranged telescoping assemblies one ofwhich is stationary and fixed, the other telescoping assembly beingvertically movable in said fixed ssembly, an overhanging pump supportmounted on the upper end of the movable telescoping assembly,.ahorizontal circular cover on said pump support below which the pumplance extends downward, handle means extending up from the cover, adepending semi-circular shielding apron attached to said circularcontainer cover, and an automatic latch mechanism operative uponmovement of the movable assembly to an uppermost position wherein thepump is clear of the container to hold said movable assembly in saidposition, said movable assembly being rotary on the stationary assemblywhen latched p.

17. An elevator for a type lubricant pump, comprising inner and outertelescoping cylinders, means on the outer cylinder for supporting it ina vertical position, the inner cylinder being rotary in the outercylinder and being reciprocative between an extended latched positionand a retracted position wherein the upper end of the inner cylinderprojects from the upper end of the outer cylinder, a bracket extendingoutwardly and downwardly from the upper end of the inner cylinder, acircular plate mounted on said bracket transversely of and alongside thecylinders, the plate being positioned below the upper end of the outercylinder when the inner cylinder is retracted, said plate beingapertured to receive the lance of a pump with other parts of the pumpsupported on top the plate, and a latch for locking the inner cylinderin its extended position, said latch comprising a lug carried by one ofthe cylinders biased towards the other cylinder and cooperating with arecess formed in said other cylinder, said recess extending at leastpartially around said other cylinder to permit its rotation with respectto the lug when the inner cylinder is raised to the latched position.

18. An elevator as set forth in claim 17, wherein said bracket has apair of arms curved down and fastened to the circular plate on oppositesides of the lance-receiving aperture in the plate.

19. An elevator as set forth in claim 17 wherein the outer cylinder isformed with a notch in its upper end and wherein the inner cylinder hasa lug adjacent its upper end cooperable with said notch to position theinner cylinder in a rotary direction when the inner cylinder is in itretracted position.

20. An elevator as set forth in claim 19 further including an apronextending from the margin of the circular plate.

ALEXANDER P. FOX.

References Cited in the file of this patent' UNITED STATES PATENTSNumber Name Date 30,633 Larcher Nov. 13, 1860 1,753,506 Florine Apr. -8,1930 1,824,866 Bristol Sept. 29, 1931 2,105,990 Schultz Jan. 18, 19382,149,141 Hunsicker Feb. 28, 1939 2,212,749 Pelouch Aug. 2'7, 19402,236,095 Ginter l Mar. 25, 1941

